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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,110,386,000 | 31,304,120 | 31,304,120 |
| 2006 | $1,273,644,000 | 32,687,431 | 32,687,431 |
| 2007 | $1,645,126,000 | 40,220,522 | 40,220,522 |
| 2008 | $1,920,946,000 | 46,827,963 | 46,827,963 |
| 2009 | $1,598,288,000 | 40,420,055 | 40,420,055 |
| 2010 | $1,906,692,291 | 40,828,340 | 40,828,340 |
| 2011 | $2,222,173,093 | 43,536,805 | 43,536,805 |
Note: Quantity represents Weight in kilograms
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